/** 
 * Copyright (c) 2015 committers of YAKINDU and others. 
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0 
 * which accompanies this distribution, and is available at 
 * http://www.eclipse.org/legal/epl-v10.html 
 * Contributors:
 * committers of YAKINDU - initial API and implementation
 *
*/
package org.yakindu.base.types.provider;

import java.util.Collection;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
import org.eclipse.emf.edit.provider.ItemPropertyDescriptor;
import org.eclipse.emf.edit.provider.ViewerNotification;
import org.yakindu.base.types.Operation;
import org.yakindu.base.types.Parameter;
import org.yakindu.base.types.Type;
import org.yakindu.base.types.TypeSpecifier;
import org.yakindu.base.types.TypesFactory;
import org.yakindu.base.types.TypesPackage;

/**
 * This is the item provider adapter for a {@link org.yakindu.base.types.Operation} object.
 * <!-- begin-user-doc --> <!--
 * end-user-doc -->
 * @generated
 */
public class OperationItemProvider extends TypedDeclarationItemProvider {
	/**
	 * This constructs an instance from a factory and a notifier. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public OperationItemProvider(AdapterFactory adapterFactory) {
		super(adapterFactory);
	}

	/**
	 * This returns the property descriptors for the adapted class. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	@Override
	public List<IItemPropertyDescriptor> getPropertyDescriptors(Object object) {
		if (itemPropertyDescriptors == null) {
			super.getPropertyDescriptors(object);

			addVariadicPropertyDescriptor(object);
		}
		return itemPropertyDescriptors;
	}

	/**
	 * This adds a property descriptor for the Variadic feature.
	 * <!-- begin-user-doc
	 * --> <!-- end-user-doc -->
	 * @generated
	 */
	protected void addVariadicPropertyDescriptor(Object object) {
		itemPropertyDescriptors.add
			(createItemPropertyDescriptor
				(((ComposeableAdapterFactory)adapterFactory).getRootAdapterFactory(),
				 getResourceLocator(),
				 getString("_UI_Operation_variadic_feature"),
				 getString("_UI_PropertyDescriptor_description", "_UI_Operation_variadic_feature", "_UI_Operation_type"),
				 TypesPackage.Literals.OPERATION__VARIADIC,
				 false,
				 false,
				 false,
				 ItemPropertyDescriptor.BOOLEAN_VALUE_IMAGE,
				 null,
				 null));
	}

	/**
	 * This specifies how to implement {@link #getChildren} and is used to deduce an appropriate feature for an
	 * {@link org.eclipse.emf.edit.command.AddCommand}, {@link org.eclipse.emf.edit.command.RemoveCommand} or
	 * {@link org.eclipse.emf.edit.command.MoveCommand} in {@link #createCommand}.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public Collection<? extends EStructuralFeature> getChildrenFeatures(Object object) {
		if (childrenFeatures == null) {
			super.getChildrenFeatures(object);
			childrenFeatures.add(TypesPackage.Literals.GENERIC_ELEMENT__TYPE_PARAMETERS);
			childrenFeatures.add(TypesPackage.Literals.OPERATION__PARAMETERS);
		}
		return childrenFeatures;
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	protected EStructuralFeature getChildFeature(Object object, Object child) {
		// Check the type of the specified child object and return the proper feature to use for
		// adding (see {@link AddCommand}) it as a child.

		return super.getChildFeature(object, child);
	}

	/**
	 * This returns Operation.gif.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public Object getImage(Object object) {
		return overlayImage(object, getResourceLocator().getImage("full/obj16/Operation"));
	}

	/**
	 * @generated NOT
	 */
	@Override
	public String getText(Object object) {
		Operation operation = (Operation) object;
		if (operation.getName() == null) {
			return "null";
		}
		StringBuilder builder = new StringBuilder(operation.getName());
		builder.append("(");
		EList<Parameter> parameters = operation.getParameters();
		String sep = "";
		for (Parameter parameter : parameters) {
			builder.append(sep);
			builder.append(parameter.getName());
			builder.append(" : ");
			Type paramType = parameter.getType();
			String typeName = (paramType != null) ? paramType.getName() : "<some type>";
			builder.append(typeName);
			sep = ", ";
		}
		builder.append(")");
		if (operation.getType() != null) {
			builder.append(" : ");
			String name = operation.getType().getName();
			builder.append(name == null ? "void" : name);
		}
		return builder.toString();
	}

	protected String getTypeName(TypeSpecifier typeSpecifier) {
		Type type = (Type) typeSpecifier.eGet(TypesPackage.Literals.TYPE_SPECIFIER__TYPE, false);
		String typeName = "";
		if (type == null) {
			typeName = "null";
		} else if (type.eIsProxy()) {
			URI eProxyURI = ((InternalEObject) type).eProxyURI();
			typeName = StringUtils.substringAfterLast(eProxyURI.fragment(), ".");
		} else {
			typeName = type.getName();
		}
		return typeName;
	}

	/**
	 * This handles model notifications by calling {@link #updateChildren} to update any cached
	 * children and by creating a viewer notification, which it passes to {@link #fireNotifyChanged}.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void notifyChanged(Notification notification) {
		updateChildren(notification);

		switch (notification.getFeatureID(Operation.class)) {
			case TypesPackage.OPERATION__VARIADIC:
				fireNotifyChanged(new ViewerNotification(notification, notification.getNotifier(), false, true));
				return;
			case TypesPackage.OPERATION__TYPE_PARAMETERS:
			case TypesPackage.OPERATION__PARAMETERS:
				fireNotifyChanged(new ViewerNotification(notification, notification.getNotifier(), true, false));
				return;
		}
		super.notifyChanged(notification);
	}

	/**
	 * This adds {@link org.eclipse.emf.edit.command.CommandParameter}s describing the children
	 * that can be created under this object.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	protected void collectNewChildDescriptors(Collection<Object> newChildDescriptors, Object object) {
		super.collectNewChildDescriptors(newChildDescriptors, object);

		newChildDescriptors.add
			(createChildParameter
				(TypesPackage.Literals.GENERIC_ELEMENT__TYPE_PARAMETERS,
				 TypesFactory.eINSTANCE.createTypeParameter()));

		newChildDescriptors.add
			(createChildParameter
				(TypesPackage.Literals.OPERATION__PARAMETERS,
				 TypesFactory.eINSTANCE.createParameter()));
	}

	/**
	 * This returns the label text for {@link org.eclipse.emf.edit.command.CreateChildCommand}.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public String getCreateChildText(Object owner, Object feature, Object child, Collection<?> selection) {
		Object childFeature = feature;
		Object childObject = child;

		boolean qualify =
			childFeature == TypesPackage.Literals.ANNOTATABLE_ELEMENT__ANNOTATION_INFO ||
			childFeature == TypesPackage.Literals.META_COMPOSITE__META_FEATURES ||
			childFeature == TypesPackage.Literals.OPERATION__PARAMETERS ||
			childFeature == TypesPackage.Literals.GENERIC_ELEMENT__TYPE_PARAMETERS;

		if (qualify) {
			return getString
				("_UI_CreateChild_text2",
				 new Object[] { getTypeText(childObject), getFeatureText(childFeature), getTypeText(owner) });
		}
		return super.getCreateChildText(owner, feature, child, selection);
	}

}
